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???
10/10/06 12:24
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 		 #126129 - memory is one thing, today is another
Responding to: ???'s previous message
It's a component of a microcomputer ... Which is what a microcontroller wants to be.

WRONG!

no microcontroller "want to be a micocomputer" it is a stupid mistake of many so called designers trying to make a "square" microcontroller fit into the "round" hole for a microcomputer.

Trying to make a '51 fit in a place where it was never intended to be, is not the fault of the '51 but the fault of the i.. - be nice - whoever chose it for that app.

For as long as I can remember, "not enough I/O's" has been a chronic problem.
memory is one thing, today is another.
The problem is gone. today with internal Flash and RAM you have all 32 pins for I/O on a standard issue and, if that is not enough, there are plenty of 8-porters around. In addition the offerings in IIC, SPI etc have exploded in recent years.

Erik


List of 69 messages in thread
TopicAuthorDate
Long Division            01/01/70 00:00      
   teach the kids the slide rule!!            01/01/70 00:00      
      I don't know about that slide-rule ...            01/01/70 00:00      
         not the point            01/01/70 00:00      
   We Homeschool our kids            01/01/70 00:00      
      Not "foundational"            01/01/70 00:00      
         8255 is DEAD            01/01/70 00:00      
            no, not "industry professionals "            01/01/70 00:00      
            Stupid though            01/01/70 00:00      
               Over here it was Whole Language Reading            01/01/70 00:00      
                  On the other hand ...            01/01/70 00:00      
                  Plus ca change            01/01/70 00:00      
            I am not so sure            01/01/70 00:00      
            the purpose of teaching 8255...            01/01/70 00:00      
               high-speed my butt            01/01/70 00:00      
                  have you read the footnote?            01/01/70 00:00      
            0xDEAD            01/01/70 00:00      
            what does DEAD mean?            01/01/70 00:00      
               some like kicking a dead horse            01/01/70 00:00      
                  that's why you don't do electronics as a hobby.            01/01/70 00:00      
                     not exacttly            01/01/70 00:00      
         It's a component of a microcomputer            01/01/70 00:00      
            memory is one thing, today is another            01/01/70 00:00      
               That\'s not quite true ...            01/01/70 00:00      
                  6 vs 2 clock            01/01/70 00:00      
                     I wasn't considering them ...            01/01/70 00:00      
                        but there is            01/01/70 00:00      
                           No doubt about it            01/01/70 00:00      
                              IIC recently upgraded to 1MHZ and I have run            01/01/70 00:00      
                                 Interesting ... what operates at that rate?            01/01/70 00:00      
                                    this and a HUH?            01/01/70 00:00      
                                       You've referred to that before, Erik ...            01/01/70 00:00      
                                          you are missing half the story and mixing            01/01/70 00:00      
                                             depends on what you compare            01/01/70 00:00      
                                                comparing            01/01/70 00:00      
                                                   some are ruled out ...            01/01/70 00:00      
                                                      the birth has happened            01/01/70 00:00      
                                                         uPSDs            01/01/70 00:00      
                                                         in the prototype area or ...            01/01/70 00:00      
                                                            Richard, how old are you?            01/01/70 00:00      
                                                               PSDs            01/01/70 00:00      
                                                                  isn't EVERYTHING ST makes with an MCU a uPSD?            01/01/70 00:00      
               Intel called them single-chip microcomputers            01/01/70 00:00      
                  greedy, are we?            01/01/70 00:00      
                     Yep ... greedy ... I need a 48KB buffer ...            01/01/70 00:00      
         fast I/O            01/01/70 00:00      
            Can''t do it            01/01/70 00:00      
               typo            01/01/70 00:00      
               It depends on what your definition of response is.            01/01/70 00:00      
                  I read the post the same way as Steve            01/01/70 00:00      
                     Perhaps, but the i8255 does it automatically            01/01/70 00:00      
                  No time            01/01/70 00:00      
                     That was my point!            01/01/70 00:00      
                        long story short            01/01/70 00:00      
                           move?            01/01/70 00:00      
                           take a look ...            01/01/70 00:00      
                        where do you buy that?            01/01/70 00:00      
                           Normally, the board determines that            01/01/70 00:00      
                              where did he say that?            01/01/70 00:00      
                                 Yes, it's a mystery ... but ...            01/01/70 00:00      
   Teaching Numeracy            01/01/70 00:00      
      Numeracy            01/01/70 00:00      
         That's where lots of education is lost ...            01/01/70 00:00      
   Two ways to do math            01/01/70 00:00      
   The 3 Rs            01/01/70 00:00      
      The middle \'R\'            01/01/70 00:00      
         when I were trined to be a spy ..            01/01/70 00:00      
            Fast block lettering            01/01/70 00:00      
               practice, practice            01/01/70 00:00      

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